docs: def get_total_paid_for_remaining_stock(self) -> Decimal:
          """ Returns the amount paid only for the remaining stock """
          paid = Decimal(0)
  
          accounts = self.get_holding_accounts()
          for acc in accounts:
              splits = self.get_available_splits_for_account(acc)
              paid += sum(split.value for split in splits)
          return paid